20553700 has 18 divisors (see below), whose sum is σ = 44601746. Its totient is φ = 8221440.

The previous prime is 20553691. The next prime is 20553703. The reversal of 20553700 is 735502.

It can be written as a sum of positive squares in 3 ways, for example, as 141376 + 20412324 = 376^2 + 4518^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102669 + ... + 102868.

Almost surely, 2^20553700 is an apocalyptic number.

20553700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20553700 is an abundant number, since it is smaller than the sum of its proper divisors (24048046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20553700 is a wasteful number, since it uses less digits than its factorization.

20553700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205551 (or 205544 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 20553700 is about 4533.6188635570. The cubic root of 20553700 is about 273.9239492702.

The spelling of 20553700 in words is "twenty million, five hundred fifty-three thousand, seven hundred".